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File: /home/studionolh/www/wp-includes/Requests/Cookie/reusable-blocks/random_compat.tar
cast_to_int.php000064400000005106152331347600007571 0ustar00<?php
/**
 * Random_* Compatibility Library
 * for using the new PHP 7 random_* API in PHP 5 projects
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

if (!is_callable('RandomCompat_intval')) {
    
    /**
     * Cast to an integer if we can, safely.
     * 
     * If you pass it a float in the range (~PHP_INT_MAX, PHP_INT_MAX)
     * (non-inclusive), it will sanely cast it to an int. If you it's equal to
     * ~PHP_INT_MAX or PHP_INT_MAX, we let it fail as not an integer. Floats 
     * lose precision, so the <= and => operators might accidentally let a float
     * through.
     * 
     * @param int|float $number    The number we want to convert to an int
     * @param bool      $fail_open Set to true to not throw an exception
     * 
     * @return float|int
     * @psalm-suppress InvalidReturnType
     *
     * @throws TypeError
     */
    function RandomCompat_intval($number, $fail_open = false)
    {
        if (is_int($number) || is_float($number)) {
            $number += 0;
        } elseif (is_numeric($number)) {
            $number += 0;
        }

        if (
            is_float($number)
            &&
            $number > ~PHP_INT_MAX
            &&
            $number < PHP_INT_MAX
        ) {
            $number = (int) $number;
        }

        if (is_int($number)) {
            return (int) $number;
        } elseif (!$fail_open) {
            throw new TypeError(
                'Expected an integer.'
            );
        }
        return $number;
    }
}
random.php000064400000017007152331347600006546 0ustar00<?php
/**
 * Random_* Compatibility Library
 * for using the new PHP 7 random_* API in PHP 5 projects
 *
 * @version 2.0.10
 * @released 2017-03-13
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

if (!defined('PHP_VERSION_ID')) {
    // This constant was introduced in PHP 5.2.7
    $RandomCompatversion = array_map('intval', explode('.', PHP_VERSION));
    define(
        'PHP_VERSION_ID',
        $RandomCompatversion[0] * 10000
        + $RandomCompatversion[1] * 100
        + $RandomCompatversion[2]
    );
    $RandomCompatversion = null;
}

/**
 * PHP 7.0.0 and newer have these functions natively.
 */
if (PHP_VERSION_ID >= 70000) {
    return;
}

if (!defined('RANDOM_COMPAT_READ_BUFFER')) {
    define('RANDOM_COMPAT_READ_BUFFER', 8);
}

$RandomCompatDIR = dirname(__FILE__);

require_once $RandomCompatDIR . '/byte_safe_strings.php';
require_once $RandomCompatDIR . '/cast_to_int.php';
require_once $RandomCompatDIR . '/error_polyfill.php';

if (!is_callable('random_bytes')) {
    /**
     * PHP 5.2.0 - 5.6.x way to implement random_bytes()
     *
     * We use conditional statements here to define the function in accordance
     * to the operating environment. It's a micro-optimization.
     *
     * In order of preference:
     *   1. Use libsodium if available.
     *   2. fread() /dev/urandom if available (never on Windows)
     *   3. mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM)
     *   4. COM('CAPICOM.Utilities.1')->GetRandom()
     *
     * See RATIONALE.md for our reasoning behind this particular order
     */
    if (extension_loaded('libsodium')) {
        // See random_bytes_libsodium.php
        if (PHP_VERSION_ID >= 50300 && is_callable('\\Sodium\\randombytes_buf')) {
            require_once $RandomCompatDIR . '/random_bytes_libsodium.php';
        } elseif (method_exists('Sodium', 'randombytes_buf')) {
            require_once $RandomCompatDIR . '/random_bytes_libsodium_legacy.php';
        }
    }

    /**
     * Reading directly from /dev/urandom:
     */
    if (DIRECTORY_SEPARATOR === '/') {
        // DIRECTORY_SEPARATOR === '/' on Unix-like OSes -- this is a fast
        // way to exclude Windows.
        $RandomCompatUrandom = true;
        $RandomCompat_basedir = ini_get('open_basedir');

        if (!empty($RandomCompat_basedir)) {
            $RandomCompat_open_basedir = explode(
                PATH_SEPARATOR,
                strtolower($RandomCompat_basedir)
            );
            $RandomCompatUrandom = (array() !== array_intersect(
                array('/dev', '/dev/', '/dev/urandom'),
                $RandomCompat_open_basedir
            ));
            $RandomCompat_open_basedir = null;
        }

        if (
            !is_callable('random_bytes')
            &&
            $RandomCompatUrandom
            &&
            @is_readable('/dev/urandom')
        ) {
            // Error suppression on is_readable() in case of an open_basedir
            // or safe_mode failure. All we care about is whether or not we
            // can read it at this point. If the PHP environment is going to
            // panic over trying to see if the file can be read in the first
            // place, that is not helpful to us here.

            // See random_bytes_dev_urandom.php
            require_once $RandomCompatDIR . '/random_bytes_dev_urandom.php';
        }
        // Unset variables after use
        $RandomCompat_basedir = null;
    } else {
        $RandomCompatUrandom = false;
    }

    /**
     * mcrypt_create_iv()
     *
     * We only want to use mcypt_create_iv() if:
     *
     * - random_bytes() hasn't already been defined
     * - the mcrypt extensions is loaded
     * - One of these two conditions is true:
     *   - We're on Windows (DIRECTORY_SEPARATOR !== '/')
     *   - We're not on Windows and /dev/urandom is readabale
     *     (i.e. we're not in a chroot jail)
     * - Special case:
     *   - If we're not on Windows, but the PHP version is between
     *     5.6.10 and 5.6.12, we don't want to use mcrypt. It will
     *     hang indefinitely. This is bad.
     *   - If we're on Windows, we want to use PHP >= 5.3.7 or else
     *     we get insufficient entropy errors.
     */
    if (
        !is_callable('random_bytes')
        &&
        // Windows on PHP < 5.3.7 is broken, but non-Windows is not known to be.
        (DIRECTORY_SEPARATOR === '/' || PHP_VERSION_ID >= 50307)
        &&
        // Prevent this code from hanging indefinitely on non-Windows;
        // see https://bugs.php.net/bug.php?id=69833
        (
            DIRECTORY_SEPARATOR !== '/' ||
            (PHP_VERSION_ID <= 50609 || PHP_VERSION_ID >= 50613)
        )
        &&
        extension_loaded('mcrypt')
    ) {
        // See random_bytes_mcrypt.php
        require_once $RandomCompatDIR . '/random_bytes_mcrypt.php';
    }
    $RandomCompatUrandom = null;

    /**
     * This is a Windows-specific fallback, for when the mcrypt extension
     * isn't loaded.
     */
    if (
        !is_callable('random_bytes')
        &&
        extension_loaded('com_dotnet')
        &&
        class_exists('COM')
    ) {
        $RandomCompat_disabled_classes = preg_split(
            '#\s*,\s*#',
            strtolower(ini_get('disable_classes'))
        );

        if (!in_array('com', $RandomCompat_disabled_classes)) {
            try {
                $RandomCompatCOMtest = new COM('CAPICOM.Utilities.1');
                if (method_exists($RandomCompatCOMtest, 'GetRandom')) {
                    // See random_bytes_com_dotnet.php
                    require_once $RandomCompatDIR . '/random_bytes_com_dotnet.php';
                }
            } catch (com_exception $e) {
                // Don't try to use it.
            }
        }
        $RandomCompat_disabled_classes = null;
        $RandomCompatCOMtest = null;
    }

    /**
     * throw new Exception
     */
    if (!is_callable('random_bytes')) {
        /**
         * We don't have any more options, so let's throw an exception right now
         * and hope the developer won't let it fail silently.
         *
         * @param mixed $length
         * @return void
         * @throws Exception
         */
        function random_bytes($length)
        {
            unset($length); // Suppress "variable not used" warnings.
            throw new Exception(
                'There is no suitable CSPRNG installed on your system'
            );
        }
    }
}

if (!is_callable('random_int')) {
    require_once $RandomCompatDIR . '/random_int.php';
}

$RandomCompatDIR = null;
random_bytes_libsodium_legacy.php000064400000005516152331347600013351 0ustar00<?php
/**
 * Random_* Compatibility Library 
 * for using the new PHP 7 random_* API in PHP 5 projects
 * 
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

if (!is_callable('random_bytes')) {
    /**
     * If the libsodium PHP extension is loaded, we'll use it above any other
     * solution.
     *
     * libsodium-php project:
     * @ref https://github.com/jedisct1/libsodium-php
     *
     * @param int $bytes
     *
     * @throws Exception
     *
     * @return string
     */
    function random_bytes($bytes)
    {
        try {
            $bytes = RandomCompat_intval($bytes);
        } catch (TypeError $ex) {
            throw new TypeError(
                'random_bytes(): $bytes must be an integer'
            );
        }

        if ($bytes < 1) {
            throw new Error(
                'Length must be greater than 0'
            );
        }

        /**
         * @var string
         */
        $buf = '';

        /**
         * \Sodium\randombytes_buf() doesn't allow more than 2147483647 bytes to be
         * generated in one invocation.
         */
        if ($bytes > 2147483647) {
            for ($i = 0; $i < $bytes; $i += 1073741824) {
                $n = ($bytes - $i) > 1073741824
                    ? 1073741824
                    : $bytes - $i;
                $buf .= Sodium::randombytes_buf((int) $n);
            }
        } else {
            $buf .= Sodium::randombytes_buf((int) $bytes);
        }

        if (is_string($buf)) {
            if (RandomCompat_strlen($buf) === $bytes) {
                return $buf;
            }
        }

        /**
         * If we reach here, PHP has failed us.
         */
        throw new Exception(
            'Could not gather sufficient random data'
        );
    }
}
random_bytes_mcrypt.php000064400000004731152331347600011352 0ustar00<?php
/**
 * Random_* Compatibility Library 
 * for using the new PHP 7 random_* API in PHP 5 projects
 * 
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

if (!is_callable('random_bytes')) {
    /**
     * Powered by ext/mcrypt (and thankfully NOT libmcrypt)
     *
     * @ref https://bugs.php.net/bug.php?id=55169
     * @ref https://github.com/php/php-src/blob/c568ffe5171d942161fc8dda066bce844bdef676/ext/mcrypt/mcrypt.c#L1321-L1386
     *
     * @param int $bytes
     *
     * @throws Exception
     *
     * @return string
     */
    function random_bytes($bytes)
    {
        try {
            $bytes = RandomCompat_intval($bytes);
        } catch (TypeError $ex) {
            throw new TypeError(
                'random_bytes(): $bytes must be an integer'
            );
        }

        if ($bytes < 1) {
            throw new Error(
                'Length must be greater than 0'
            );
        }

        $buf = @mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM);
        if (
            $buf !== false
            &&
            RandomCompat_strlen($buf) === $bytes
        ) {
            /**
             * Return our random entropy buffer here:
             */
            return $buf;
        }

        /**
         * If we reach here, PHP has failed us.
         */
        throw new Exception(
            'Could not gather sufficient random data'
        );
    }
}
random_bytes_com_dotnet.php000064400000005527152331347600012173 0ustar00<?php
/**
 * Random_* Compatibility Library 
 * for using the new PHP 7 random_* API in PHP 5 projects
 * 
 * The MIT License (MIT)
 * 
 * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

if (!is_callable('random_bytes')) {
    /**
     * Windows with PHP < 5.3.0 will not have the function
     * openssl_random_pseudo_bytes() available, so let's use
     * CAPICOM to work around this deficiency.
     *
     * @param int $bytes
     *
     * @throws Exception
     *
     * @return string
     */
    function random_bytes($bytes)
    {
        try {
            $bytes = RandomCompat_intval($bytes);
        } catch (TypeError $ex) {
            throw new TypeError(
                'random_bytes(): $bytes must be an integer'
            );
        }

        if ($bytes < 1) {
            throw new Error(
                'Length must be greater than 0'
            );
        }

        $buf = '';
        if (!class_exists('COM')) {
            throw new Error(
                'COM does not exist'
            );
        }
        $util = new COM('CAPICOM.Utilities.1');
        $execCount = 0;

        /**
         * Let's not let it loop forever. If we run N times and fail to
         * get N bytes of random data, then CAPICOM has failed us.
         */
        do {
            $buf .= base64_decode($util->GetRandom($bytes, 0));
            if (RandomCompat_strlen($buf) >= $bytes) {
                /**
                 * Return our random entropy buffer here:
                 */
                return RandomCompat_substr($buf, 0, $bytes);
            }
            ++$execCount;
        } while ($execCount < $bytes);

        /**
         * If we reach here, PHP has failed us.
         */
        throw new Exception(
            'Could not gather sufficient random data'
        );
    }
}byte_safe_strings.php000064400000013525152331347600011001 0ustar00<?php
/**
 * Random_* Compatibility Library
 * for using the new PHP 7 random_* API in PHP 5 projects
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

if (!is_callable('RandomCompat_strlen')) {
    if (
        defined('MB_OVERLOAD_STRING') &&
        ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING
    ) {
        /**
         * strlen() implementation that isn't brittle to mbstring.func_overload
         *
         * This version uses mb_strlen() in '8bit' mode to treat strings as raw
         * binary rather than UTF-8, ISO-8859-1, etc
         *
         * @param string $binary_string
         *
         * @throws TypeError
         *
         * @return int
         */
        function RandomCompat_strlen($binary_string)
        {
            if (!is_string($binary_string)) {
                throw new TypeError(
                    'RandomCompat_strlen() expects a string'
                );
            }

            return (int) mb_strlen($binary_string, '8bit');
        }

    } else {
        /**
         * strlen() implementation that isn't brittle to mbstring.func_overload
         *
         * This version just used the default strlen()
         *
         * @param string $binary_string
         *
         * @throws TypeError
         *
         * @return int
         */
        function RandomCompat_strlen($binary_string)
        {
            if (!is_string($binary_string)) {
                throw new TypeError(
                    'RandomCompat_strlen() expects a string'
                );
            }
            return (int) strlen($binary_string);
        }
    }
}

if (!is_callable('RandomCompat_substr')) {

    if (
        defined('MB_OVERLOAD_STRING')
        &&
        ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING
    ) {
        /**
         * substr() implementation that isn't brittle to mbstring.func_overload
         *
         * This version uses mb_substr() in '8bit' mode to treat strings as raw
         * binary rather than UTF-8, ISO-8859-1, etc
         *
         * @param string $binary_string
         * @param int $start
         * @param int $length (optional)
         *
         * @throws TypeError
         *
         * @return string
         */
        function RandomCompat_substr($binary_string, $start, $length = null)
        {
            if (!is_string($binary_string)) {
                throw new TypeError(
                    'RandomCompat_substr(): First argument should be a string'
                );
            }

            if (!is_int($start)) {
                throw new TypeError(
                    'RandomCompat_substr(): Second argument should be an integer'
                );
            }

            if ($length === null) {
                /**
                 * mb_substr($str, 0, NULL, '8bit') returns an empty string on
                 * PHP 5.3, so we have to find the length ourselves.
                 */
                $length = RandomCompat_strlen($binary_string) - $start;
            } elseif (!is_int($length)) {
                throw new TypeError(
                    'RandomCompat_substr(): Third argument should be an integer, or omitted'
                );
            }

            // Consistency with PHP's behavior
            if ($start === RandomCompat_strlen($binary_string) && $length === 0) {
                return '';
            }
            if ($start > RandomCompat_strlen($binary_string)) {
                return '';
            }

            return (string) mb_substr($binary_string, $start, $length, '8bit');
        }

    } else {

        /**
         * substr() implementation that isn't brittle to mbstring.func_overload
         *
         * This version just uses the default substr()
         *
         * @param string $binary_string
         * @param int $start
         * @param int $length (optional)
         *
         * @throws TypeError
         *
         * @return string
         */
        function RandomCompat_substr($binary_string, $start, $length = null)
        {
            if (!is_string($binary_string)) {
                throw new TypeError(
                    'RandomCompat_substr(): First argument should be a string'
                );
            }

            if (!is_int($start)) {
                throw new TypeError(
                    'RandomCompat_substr(): Second argument should be an integer'
                );
            }

            if ($length !== null) {
                if (!is_int($length)) {
                    throw new TypeError(
                        'RandomCompat_substr(): Third argument should be an integer, or omitted'
                    );
                }

                return (string) substr($binary_string, $start, $length);
            }

            return (string) substr($binary_string, $start);
        }
    }
}
error_polyfill.php000064400000003241152331347600010324 0ustar00<?php
/**
 * Random_* Compatibility Library 
 * for using the new PHP 7 random_* API in PHP 5 projects
 * 
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

if (!class_exists('Error', false)) {
    // We can't really avoid making this extend Exception in PHP 5.
    class Error extends Exception
    {
        
    }
}

if (!class_exists('TypeError', false)) {
    if (is_subclass_of('Error', 'Exception')) {
        class TypeError extends Error
        {
            
        }
    } else {
        class TypeError extends Exception
        {
            
        }
    }
}
random_int.php000064400000014166152331347600007423 0ustar00<?php

if (!is_callable('random_int')) {
    /**
     * Random_* Compatibility Library
     * for using the new PHP 7 random_* API in PHP 5 projects
     *
     * The MIT License (MIT)
     *
     * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
     *
     * Permission is hereby granted, free of charge, to any person obtaining a copy
     * of this software and associated documentation files (the "Software"), to deal
     * in the Software without restriction, including without limitation the rights
     * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     * copies of the Software, and to permit persons to whom the Software is
     * furnished to do so, subject to the following conditions:
     *
     * The above copyright notice and this permission notice shall be included in
     * all copies or substantial portions of the Software.
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     * SOFTWARE.
     */

    /**
     * Fetch a random integer between $min and $max inclusive
     *
     * @param int $min
     * @param int $max
     *
     * @throws Exception
     *
     * @return int
     */
    function random_int($min, $max)
    {
        /**
         * Type and input logic checks
         *
         * If you pass it a float in the range (~PHP_INT_MAX, PHP_INT_MAX)
         * (non-inclusive), it will sanely cast it to an int. If you it's equal to
         * ~PHP_INT_MAX or PHP_INT_MAX, we let it fail as not an integer. Floats
         * lose precision, so the <= and => operators might accidentally let a float
         * through.
         */

        try {
            $min = RandomCompat_intval($min);
        } catch (TypeError $ex) {
            throw new TypeError(
                'random_int(): $min must be an integer'
            );
        }

        try {
            $max = RandomCompat_intval($max);
        } catch (TypeError $ex) {
            throw new TypeError(
                'random_int(): $max must be an integer'
            );
        }

        /**
         * Now that we've verified our weak typing system has given us an integer,
         * let's validate the logic then we can move forward with generating random
         * integers along a given range.
         */
        if ($min > $max) {
            throw new Error(
                'Minimum value must be less than or equal to the maximum value'
            );
        }

        if ($max === $min) {
            return (int) $min;
        }

        /**
         * Initialize variables to 0
         *
         * We want to store:
         * $bytes => the number of random bytes we need
         * $mask => an integer bitmask (for use with the &) operator
         *          so we can minimize the number of discards
         */
        $attempts = $bits = $bytes = $mask = $valueShift = 0;

        /**
         * At this point, $range is a positive number greater than 0. It might
         * overflow, however, if $max - $min > PHP_INT_MAX. PHP will cast it to
         * a float and we will lose some precision.
         */
        $range = $max - $min;

        /**
         * Test for integer overflow:
         */
        if (!is_int($range)) {

            /**
             * Still safely calculate wider ranges.
             * Provided by @CodesInChaos, @oittaa
             *
             * @ref https://gist.github.com/CodesInChaos/03f9ea0b58e8b2b8d435
             *
             * We use ~0 as a mask in this case because it generates all 1s
             *
             * @ref https://eval.in/400356 (32-bit)
             * @ref http://3v4l.org/XX9r5  (64-bit)
             */
            $bytes = PHP_INT_SIZE;
            $mask = ~0;

        } else {

            /**
             * $bits is effectively ceil(log($range, 2)) without dealing with
             * type juggling
             */
            while ($range > 0) {
                if ($bits % 8 === 0) {
                    ++$bytes;
                }
                ++$bits;
                $range >>= 1;
                $mask = $mask << 1 | 1;
            }
            $valueShift = $min;
        }

        $val = 0;
        /**
         * Now that we have our parameters set up, let's begin generating
         * random integers until one falls between $min and $max
         */
        do {
            /**
             * The rejection probability is at most 0.5, so this corresponds
             * to a failure probability of 2^-128 for a working RNG
             */
            if ($attempts > 128) {
                throw new Exception(
                    'random_int: RNG is broken - too many rejections'
                );
            }

            /**
             * Let's grab the necessary number of random bytes
             */
            $randomByteString = random_bytes($bytes);

            /**
             * Let's turn $randomByteString into an integer
             *
             * This uses bitwise operators (<< and |) to build an integer
             * out of the values extracted from ord()
             *
             * Example: [9F] | [6D] | [32] | [0C] =>
             *   159 + 27904 + 3276800 + 201326592 =>
             *   204631455
             */
            $val &= 0;
            for ($i = 0; $i < $bytes; ++$i) {
                $val |= ord($randomByteString[$i]) << ($i * 8);
            }

            /**
             * Apply mask
             */
            $val &= $mask;
            $val += $valueShift;

            ++$attempts;
            /**
             * If $val overflows to a floating point number,
             * ... or is larger than $max,
             * ... or smaller than $min,
             * then try again.
             */
        } while (!is_int($val) || $val > $max || $val < $min);

        return (int) $val;
    }
}
random_bytes_dev_urandom.php000064400000012500152331347600012330 0ustar00<?php
/**
 * Random_* Compatibility Library 
 * for using the new PHP 7 random_* API in PHP 5 projects
 * 
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

if (!defined('RANDOM_COMPAT_READ_BUFFER')) {
    define('RANDOM_COMPAT_READ_BUFFER', 8);
}

if (!is_callable('random_bytes')) {
    /**
     * Unless open_basedir is enabled, use /dev/urandom for
     * random numbers in accordance with best practices
     *
     * Why we use /dev/urandom and not /dev/random
     * @ref http://sockpuppet.org/blog/2014/02/25/safely-generate-random-numbers
     *
     * @param int $bytes
     *
     * @throws Exception
     *
     * @return string
     */
    function random_bytes($bytes)
    {
        static $fp = null;
        /**
         * This block should only be run once
         */
        if (empty($fp)) {
            /**
             * We use /dev/urandom if it is a char device.
             * We never fall back to /dev/random
             */
            $fp = fopen('/dev/urandom', 'rb');
            if (!empty($fp)) {
                $st = fstat($fp);
                if (($st['mode'] & 0170000) !== 020000) {
                    fclose($fp);
                    $fp = false;
                }
            }

            if (!empty($fp)) {
                /**
                 * stream_set_read_buffer() does not exist in HHVM
                 *
                 * If we don't set the stream's read buffer to 0, PHP will
                 * internally buffer 8192 bytes, which can waste entropy
                 *
                 * stream_set_read_buffer returns 0 on success
                 */
                if (is_callable('stream_set_read_buffer')) {
                    stream_set_read_buffer($fp, RANDOM_COMPAT_READ_BUFFER);
                }
                if (is_callable('stream_set_chunk_size')) {
                    stream_set_chunk_size($fp, RANDOM_COMPAT_READ_BUFFER);
                }
            }
        }

        try {
            $bytes = RandomCompat_intval($bytes);
        } catch (TypeError $ex) {
            throw new TypeError(
                'random_bytes(): $bytes must be an integer'
            );
        }

        if ($bytes < 1) {
            throw new Error(
                'Length must be greater than 0'
            );
        }

        /**
         * This if() block only runs if we managed to open a file handle
         *
         * It does not belong in an else {} block, because the above
         * if (empty($fp)) line is logic that should only be run once per
         * page load.
         */
        if (!empty($fp)) {
            /**
             * @var int
             */
            $remaining = $bytes;

            /**
             * @var string|bool
             */
            $buf = '';

            /**
             * We use fread() in a loop to protect against partial reads
             */
            do {
                /**
                 * @var string|bool
                 */
                $read = fread($fp, $remaining);
                if (!is_string($read)) {
                    if ($read === false) {
                        /**
                         * We cannot safely read from the file. Exit the
                         * do-while loop and trigger the exception condition
                         *
                         * @var string|bool
                         */
                        $buf = false;
                        break;
                    }
                }
                /**
                 * Decrease the number of bytes returned from remaining
                 */
                $remaining -= RandomCompat_strlen($read);
                /**
                 * @var string|bool
                 */
                $buf = $buf . $read;
            } while ($remaining > 0);

            /**
             * Is our result valid?
             */
            if (is_string($buf)) {
                if (RandomCompat_strlen($buf) === $bytes) {
                    /**
                     * Return our random entropy buffer here:
                     */
                    return $buf;
                }
            }
        }

        /**
         * If we reach here, PHP has failed us.
         */
        throw new Exception(
            'Error reading from source device'
        );
    }
}
random_bytes_libsodium.php000064400000005424152331347600012023 0ustar00<?php
/**
 * Random_* Compatibility Library 
 * for using the new PHP 7 random_* API in PHP 5 projects
 * 
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

if (!is_callable('random_bytes')) {
    /**
     * If the libsodium PHP extension is loaded, we'll use it above any other
     * solution.
     *
     * libsodium-php project:
     * @ref https://github.com/jedisct1/libsodium-php
     *
     * @param int $bytes
     *
     * @throws Exception
     *
     * @return string
     */
    function random_bytes($bytes)
    {
        try {
            $bytes = RandomCompat_intval($bytes);
        } catch (TypeError $ex) {
            throw new TypeError(
                'random_bytes(): $bytes must be an integer'
            );
        }

        if ($bytes < 1) {
            throw new Error(
                'Length must be greater than 0'
            );
        }

        /**
         * \Sodium\randombytes_buf() doesn't allow more than 2147483647 bytes to be
         * generated in one invocation.
         */
        if ($bytes > 2147483647) {
            $buf = '';
            for ($i = 0; $i < $bytes; $i += 1073741824) {
                $n = ($bytes - $i) > 1073741824
                    ? 1073741824
                    : $bytes - $i;
                $buf .= \Sodium\randombytes_buf($n);
            }
        } else {
            $buf = \Sodium\randombytes_buf($bytes);
        }

        if ($buf !== false) {
            if (RandomCompat_strlen($buf) === $bytes) {
                return $buf;
            }
        }

        /**
         * If we reach here, PHP has failed us.
         */
        throw new Exception(
            'Could not gather sufficient random data'
        );
    }
}